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Crank mechanism of a four-cylinder in-line gasoline aircraft engine
Doležal, Jakub ; Kučera, Pavel (referee) ; Píštěk, Václav (advisor)
This thesis is focused on design of a steel connecting rod for the aircraft engine Walter Mikron III C produced by Parma-technik s.r.o., which could be an alternative to the existing aluminium alloy connecting rod. Research of aircraft engines and connecting rods is done before the design work itself, together with explanation of the calculation of dynamic stresses in the crank mechanism. In practical part, design of the crank mechanism is analysed, followed by the calculation of its dynamic stresses, analytically and by 1D simulation in the GT-Suite Cranktrain software. Connecting rod strength analysis is performed by analytical calculation, which is verified by FEM analysis in Ansys Mechanical software, both approaches evaluating connecting rod tension and fatigue safety. Similarly, the steel connecting rod is designed and evaluated in two designs, with an I and H shank. Drawing documentation of both designs of the connecting rod is output of this thesis.
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The influence of a computational model of crank train dynamics on engine block load
Charvát, Adam ; Dlugoš, Jozef (referee) ; Drápal, Lubomír (advisor)
This work investigates the influence of the computational model of the cranktrain dynamics on the engine block load around the main bearings depending on the discretization level of the bodies used. Four variants of the computational model of the cranktrain in the Multi-Body System software SIMDRIVE 3D are compared with respect to the load on the main bearings. Based on the obtained loads, a strength analysis of the EA211 series 1,5 MPI mass-production engine block, manufactured by ŠKODA AUTO, is performed, including the influence of pre-stress during the assembly of the cylinder head and bearing caps. To evaluate the results, a fatigue life calculation is performed, and the endurance safety factors in the grooves on the bottom of the engine block are compared.
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Balancing of 3-cylinder Tractor Engine
Přeslička, Jaroslav ; Hrdlička, Zdeněk (referee) ; Dundálek, Radim (advisor)
The thesis deals with analysis of balancing of given cranktrain. At the introductory part is solved kinematics of the crank mechanism. Another part of the text occupies with dynamics of the crank mechanism and eventuality of its balancing with using of point-mass model. This simplified model is utilized for analytic solution of given mechanism. Results of analytic solution are compared with results of MBS solution. At the last part is done analysis of minimal distance between the selected parts of the mechanism. Then simple optimization of balancing is done. At the end is considered balancing of the mechanism and simple improvement is proposed, considered are results of minimal distance analysis too.
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Cylinder deactivation of a spark-ignition engine
Fridrichová, Kateřina ; Píštěk, Václav (referee) ; Drápal, Lubomír (advisor)
This thesis focuses on a technology called cylinder deactivation. The technology helps reducing emissions and fuel consumption. The first part summarizes the possibilities of application of the cylinder deactivation technology as well as advantages resulting from combination with other technologies. The thesis also consists of two design options for valvetrain in inline four-cylinder engine and the results of simulations of dynamics of its cranktrain.
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The influence of a computational model of crank train dynamics on engine block load
Charvát, Adam ; Dlugoš, Jozef (referee) ; Drápal, Lubomír (advisor)
This work investigates the influence of the computational model of the cranktrain dynamics on the engine block load around the main bearings depending on the discretization level of the bodies used. Four variants of the computational model of the cranktrain in the Multi-Body System software SIMDRIVE 3D are compared with respect to the load on the main bearings. Based on the obtained loads, a strength analysis of the EA211 series 1,5 MPI mass-production engine block, manufactured by ŠKODA AUTO, is performed, including the influence of pre-stress during the assembly of the cylinder head and bearing caps. To evaluate the results, a fatigue life calculation is performed, and the endurance safety factors in the grooves on the bottom of the engine block are compared.
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Cylinder deactivation of a spark-ignition engine
Fridrichová, Kateřina ; Píštěk, Václav (referee) ; Drápal, Lubomír (advisor)
This thesis focuses on a technology called cylinder deactivation. The technology helps reducing emissions and fuel consumption. The first part summarizes the possibilities of application of the cylinder deactivation technology as well as advantages resulting from combination with other technologies. The thesis also consists of two design options for valvetrain in inline four-cylinder engine and the results of simulations of dynamics of its cranktrain.
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Balancing of 3-cylinder Tractor Engine
Přeslička, Jaroslav ; Hrdlička, Zdeněk (referee) ; Dundálek, Radim (advisor)
The thesis deals with analysis of balancing of given cranktrain. At the introductory part is solved kinematics of the crank mechanism. Another part of the text occupies with dynamics of the crank mechanism and eventuality of its balancing with using of point-mass model. This simplified model is utilized for analytic solution of given mechanism. Results of analytic solution are compared with results of MBS solution. At the last part is done analysis of minimal distance between the selected parts of the mechanism. Then simple optimization of balancing is done. At the end is considered balancing of the mechanism and simple improvement is proposed, considered are results of minimal distance analysis too.
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